Generate Grade Charts

gradeCharts.js

const Students = [
  {
    name: "Zhao",
    gender: 'M',
  },

  {
    name: "John",
    gender: 'M',
  },

  {
    name: "Mary",
    gender: 'M',
  },

  {
    name: "Jane",
    gender: 'M',
  },
];

const Grades = [
  {
    name: "Zhao",
    grade: 56,
  },

  {
    name: "Zhao",
    grade: 70,
  },

  {
    name: "Zhao",
    grade: 89,
  },

  {
    name: "John",
    grade: 70,
  },

  {
    name: "Jane",
    grade: 56,
  },

  {
    name: "Mary",
    grade: 56,
  },
];



const generateGradeChart = (students, grades) => {
  console.log(grades)

  const studentHash = {}

  for(let student of students){
  studentHash[student.name] = student.gender
  }
  
  console.log(studentHash)
  let interval = 10
  let max = 100
  
  let chart = {}
  
  for(let i=1; i<max; i=i+interval){
   chart[[i, i-1+interval]] = {M:0, F:0}
  }
  console.log("CHART::", chart)
  
  
  
  

  for(let grade of grades){
  
    // console.log()
    let range = getInterval(chart, grade.grade)
    if(studentHash[grade.name] === 'M'){
          chart[range]['M']++
    }
    if(studentHash[grade.name] === 'F'){
          chart[range]['F']++

    } 
  
  }
  
  console.log(chart)
  
  
  for(let [range, val] of Object.entries(chart)){
  
    for(let key in val){
      if(val[key] === 0) continue
    console.log(`Between Range ${range}  --- ${key} --- ${val[key]}`)
    }
  
  }
  
}


const getInterval = (chart, grade) => {
    
   let range = []
  for(let key of Object.keys(chart)){
  
  let interval = key.split(',').map(x => parseInt(x))
  if(interval[0] <= grade && grade <= interval[1]){
    
  range.push(interval[0])
  range.push(interval[1])
  break
  }
  }
  
  console.log(range)
  return range


}


/// genarte range from value



// const getRange = grade => {

// switch (true){

//   case (grade <= 10):
// return [1, 10]
// case (grade <= 20):
// return [11, 20]
//   case (grade <= 30):
// return [21, 30]
//   case (grade < 40):
//     return [31, 40]
//   case (grade < 50):
//     return [41, 50]
//   case (grade < 60):
//     return [51, 60]
//   case (grade < 70):
//     return [61, 70]
//   case (grade < 80):
//     return [71, 80]
//   case (grade < 90):
//     return [81, 90]
//   case (grade < 100):
//     return [91, 100]



// }

// }


generateGradeChart(Students, Grades)